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1 files changed, 89 insertions, 0 deletions

diff --git a/src/ru/olamedia/astronomy/BaseUtils.java b/src/ru/olamedia/astronomy/BaseUtils.java
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+++ b/src/ru/olamedia/astronomy/BaseUtils.java
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+package ru.olamedia.astronomy;
+
+// package com.bradsbrain.simpleastronomy;
+/*
+ *  Copyright 2011 Brad Parks
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.text.DateFormat;
+import static java.text.DateFormat.SHORT;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.TimeZone;
+
+public final class BaseUtils {
+
+	public static double exactDaysSince(Calendar myCal, double epoch) {
+		return JulianDate.makeJulianDateUsingMyModified(myCal) - epoch;
+	}
+
+	public static Calendar getSafeLocalCopy(long millis) {
+		// safe local copy
+		Calendar myCal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
+		myCal.clear();
+		myCal.setTimeInMillis(millis);
+		return myCal;
+	}
+
+	public static double adjustTo360Range(double valToAdjust) {
+		double howMany = Math.floor(valToAdjust / 360);
+		double adjustedValue = valToAdjust - (howMany * 360);
+		return adjustedValue;
+	}
+
+	public static double sinDegrees(double angleInDegrees) {
+		return Math.sin(Math.toRadians(angleInDegrees));
+	}
+
+	public static double cosDegrees(double angleInDegrees) {
+		return Math.cos(Math.toRadians(angleInDegrees));
+	}
+
+	public static double useLessPrecision(double d, int precision) {
+		double digits = Math.pow(10, precision);
+		return Math.round(d * digits) / digits;
+	}
+
+	/**
+	 * Useful date-to-string formatting which I found myself using a lot
+	 * 
+	 * @param moonDate
+	 * @return the date in GMT timezone
+	 */
+	public static String formatDateForGMT(Date moonDate) {
+		DateFormat sdf = SimpleDateFormat.getDateInstance(SHORT);
+		((SimpleDateFormat) sdf).applyPattern("yyyy-MM-dd");
+		((SimpleDateFormat) sdf).setTimeZone(TimeZone.getTimeZone("GMT"));
+		return sdf.format(moonDate);
+	}
+
+	/**
+	 * Useful date-to-string formatting which I found myself using a lot
+	 * 
+	 * @param moonDate
+	 * @param tz
+	 *            the timezone with which to format the date
+	 * @return the date in whatever timezone is default
+	 */
+	public static String formatDateAsShortDateLocalTime(Date moonDate,
+			TimeZone tz) {
+		DateFormat sdf = SimpleDateFormat.getDateInstance(SHORT);
+		sdf.setTimeZone(tz);
+		((SimpleDateFormat) sdf).applyPattern("yyyy-MM-dd");
+		return sdf.format(moonDate);
+	}
+
+}
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